BC Hydro at Work

Helicopter installs Northwest Transmission Line towers

A helicopter is used to place new transmission towers for BC Hydro's Northwest Transmission Line.

Approximately 1,000 towers called "guyed Y lattice" towers are being installed along the right-of-way for the new line. Each tower weighs about 9.5 tonnes and is about 27 metres high. Helicopter installation is necessary in areas where the terrain is challenging.

The video shows a helicopter carrying a tower from the "fly yard" where the structure was assembled, to the site where it will be placed. A construction crew guides the tower onto its pre-constructed foundation and connects the four guy lines, which hold the tower into place.

The tower placement began in July and continues through the fall.